Gas gauge



FIG. 1 is a plan view of a gas gauge;

FIG. 2 is a top perspective view of the gas gauge of FIG. 1 shown in an intended environment according to an aspect of the disclosure;

FIG. 3 is an elevational view of the gas gauge of FIG. 1; it being understood that all other sides are substantially mirror images of that shown; and,

FIG. 4 is a bottom perspective view of the gas gauge of FIG. 1.

The broken line portions of the drawings, including a gas tank, are environmental and do not form part of the claimed design. 

The ornamental design for a gas gauge, substantially as shown and described. 